Blower Door Test Procedure

Instead do all your setup upfront.

Blower door test procedure.

C building and n building. Measure the airflow through the fan with the duct system at pressure. As air is exhausted out of the house or building envelope the house becomes depressurized relative to the air pressure outside the house. As discussed in more detail later in this guide the air leakage test or blower door test uses a calibrated fan and digital pressure gauge to either pressurize or depressurize a home to a standard test pressure of 50 pascals with respect to the outside and measure the air leakage flow at that pressure.

We ll also get to find out what the major inf. Use a calibrated fan to pressurize the duct system. The multi point blower door test procedure results in a series of known values of q n fan and p n building. Ordinary least squares regression analysis is then used to calculate the leakage characteristics of the building envelope.

Retrotec has been manufacturing blower door and duct testing equipment for over 30 years. Using a blower door only not recommended the basic idea behind using a duct leakage tester to test for duct leakage is. The second part of this series will pick up with our blower door test from the moment we turn on the manometer. Blower door testing is usually performed in a depressurization mode.

During this test a calibrated fan is installed in an otherwise sealed door or window while all the other openings to the exterior are closed. Once you ve got those results unseal the vents and run your blower door test. Our energy saver 101 infographic explains the importance of a blower door test during a home energy audit. Professional energy auditors use blower door tests to help determine a home s airtightness.

Blower door test during a home energy audit. When the fan is turned on it creates a pressure difference between the outside and the inside. Holtkamp heating a c inc. The world s leading manufacturer of building diagnostic tools.

If it s a hot humid or cold day when you run the blower door first you re making the house uncomfortable for the whole time you re setting up the duct leakage tests. Then run your two duct leakage tests.